Watch-barrel



(No Model.)

F. PARKER.

WATCH BARREL.

No.,364,3.7,0. I Patented June 7, 1887.

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UNITED STATES PATENT OEEICE FRANCIS PARKER, 0E WESTON, MASSACHUSETTS.

WATCH-BARREL.

' srEcrr-ICATN forming par: of Letters Patent N0. 3e4,31o, dates June '7, 1887.

' Application tiled December 10, IYSBG. Serial No.222,056. (No model.)

To all whom it may concern.- y

Be it known that I, FRANcIs- PARKER, of Veston, in the county ot Middlesex and State of Massachusetts, have invented a new and useful Improvement in Watch-Movements, of which the following is a specification.

My invention relates to watch-movements in which the main wheel is carried directly by the barrel containing the Inainspring. W'atches so constructed have the barrel and main wheel rigidly fastened together, so that any motion imparted to the barrel is likewiseimparted to the main wheel, by which wheel motion is transmitted to the rest of the watch-movement, and when the mainspring breaks, the motion ot' the barrel being suddenly reversed reverses the motion of the main wheel and the train of gears driven by it, often causing injury to some of the other parts of the watch-movement. 'Ihe object of my invention is to prevent such injury to the movement of the watch. I effeet this object by separating the main Wheel from the barrel and connecting them by a pawl and stop, which compel the main wheel to turn with the barrel whenv the barrelV rotates in one direction and allow the main wheel to be at rest rwhen the barrel rotates in the reverse direction. 1 y

In the drawings, Figure 1 shows in elevation the main wheel and barrel containing vmy inventionand connecting parts, partly in section. Fig. 2 shows a section through the bar rel and inain wheel on the line .fr of Fig. 1,

and the arbor in elevation. Fig. 3 shows an inverted plan of the bottom plate of the barrel, the stop on the main wheel,ragainst which y the pawl on the barrel normally bears., being indicated by the circle of broken lines.

The drawings are on an enlarged scale.

Gis the main wheel, which has the raised rim M and teeth T, and engages with the pinion WV of the center wheel. O is astop on the main wheel, against which the pawl P on the under side of thebottom plate, R, of the barrel B normally bears.

Sis astud upon which the pawl P turns, and Y another stud, against which the pawlspring I of the pawl P abutst The lnainwheel G has the back-tapered hub H, which vhas the shoulder E. The barrel B ts into the main wheel G, its shoulder U resting upon the rim M of the main wheel and the opening Nin its bottom plate, It, allowing the hub H of the main wheel to passinto the barrel B, as shown. A spring-ring, L, its rim cut through at one point to allow the ring to be opened, that it may be placed around the hub H above the shoulder E of the hub, extends into the sunk rim V, which surrounds the opening N in the 'bottom plate, R, of the barrel, and locks the barrel and main wheel together, but does not bind them rigidly together, the barrel being left free to revolve independently of the main wheel when the pawl P does not bear against the stop O.

Q is the mainspring, one end of which is attached to the barrel-arbor A and the other end to the barrel B. The arbor is held in place between the hub I-I of the main wheel and the cap G of the barrel B, and passes through the hub and carries on its lower end a ratchet-wheel, which is prevented from turning back by a click. The arbor A also passes through the cap c, and is shown in the drawings squared at its upper end to admit of winding with akey. r

The operation iS as follows: When the watch is wound up, the mainspring is coiled upon the arbor. The mainspring as it uncoils drives the barrel. The pawl on the bottom plate of the barrel bears against the stop on the main wheel and causes the barrel to take with the main wheel and the main wheel to act thereby with the barrel and drive the center wheel, which latter wheel transmits motion to 'the rest ofthe watchqnovement. Vhen the mainspring breaks and the motion of the barrel is suddenly reversed, the barrel gives to any motion reverse to the direction of m0- tion to the watch-movement, the barrel acting independently of the main wheel, whereby the reverse motion is taken by the barrel and is not communicated to the main wheel, and consequently is not transmitted to the rest of the movement of the watch, the pawl-spring giving sufiiciently to allow the pawl to pass the stop on the main wheel and the barrel to continue its reverse motion independently of the main wheel until the reverse motion is Spent.

l. In a watch, the combination, withthe barrel, arbor, and mainspring, of the main Wheel G, stop O, and pawl P, substantially as described, for the purpose speeied.

2. A device for looking together a separate 5 barrel and main wheel of a watch, such thatit Shall not lock them rigidly, consisting of the (back-tapered hub H of the main Wheel having I a shoulder, E, and extending intol'lie barrel, l

and a ring, L, placed about said hub above said shoulder and extending iiito the sunk rim ro V of the bottom plate of the barrel, substaw tially as described.

FRANCIS PARKER, Witnesses:

WM. T. ROGERS, VALDRON BATES. 

